did i pick up a pos?

[sixty8c10]

i just picked up a 88 k5, body is in great shape minus a few rust holes right above the pass door drip rail. the interior is 90% complete missing some minor trim parts. i'll get to the point, idiot po removed most of the 4x4 parts. still has front rear axles, but that's all. he took out the 700r4 and xfer case and put in th350 and had a new ds made so its only 2wd. i could really get into all the other cheesy stuff he did as well, but i don't have time for it. put bluntly it is unsafe to drive til i fix it. i want to make it 4wd again. i have a np 203 xfer case that came off a th350 and idon't have a prob getting new ds's made. i was just wondering what a fully loaded 88 k5 is worth (ballpark figure) so i can make up my mind whether to fix it or strip it. also will a np203 mount to this tranny (it is a th350 short shaft) by just removing the tailshaft housing?